In hardware paced mode, the total sample rate is 400 kS/s divided by the
number of channels being sampled, with a maximum rate of 100 kS/s for
any channel.

In burst scan mode, the total sample rate is 800 kS/s divided by the
number of channels being sampled, with a maximum rate of 100 kS/s for
any channel. Burst scan mode is limited to acquisitions up to 32,768
samples, which is the capacity of the USB-1608FS-Plus FIFO.

Simultaneous Sampling
In hardware paced mode, the USB-1608FS-Plus can acquire data from up to
eight channels simultaneously. The analog data is continuously acquired,
converted to digital values, and written to the onboard FIFO buffer
until the scan stops. Data is then transferred in blocks from the device
to the computer.

Channel-Gain Queue
The channel-gain queue feature lets you configure a list of channels and
gains for each scan. Each channel can have a different gain setting.
The gain settings are stored in a channel-gain queue list that is
written to local memory on the device.

The USB-1608FS-Plus channel-gain queue list can contain up to eight
unique elements. The elements can be non-consecutive, but must be listed
in increasing order.

Digital I/O
The USB-1608FS-Plus provides eight high-drive (24 mA) digital I/O
connections. Each digital channel is individually-configurable for input
or output. When configured for input, you can use the digital I/O
terminals to detect the state of any TTL-level input.

Pull-Up/Pull-Down Configuration
USB-1608FS-Plus devices have a user-configurable internal jumper to
configure the digital bits for pull-up (default) or pull-down.

Counter Input
The USB-1608FS-Plus has a 32-bit event counter that can accept frequency
inputs up to 1 MHz. The internal counter increments when the TTL levels
transition from low to high.

When configured for input, A/D conversions can be paced by an external
source. The USB-1608FS-Plus supports TTL-level input signals up to 100
kHz.

When configured for output, the USB-1608FS-Plus can pace A/D conversions
on a second device and acquire data from all input channels
simultaneously.

Trigger Input
The USB-1608FS-Plus provides an external digital trigger input with a
trigger mode that is edge sensitive or level sensitive. Edge sensitive
is software-selectable for rising or falling edge. Level sensitive is
software-selectable for high or low level.